<template>
    <el-row class="login-page">
        <el-col :span="12" class="bg">
        </el-col>
        <el-col :span="6" :offset="3" class="form">
            <!-- 注册表单 -->
            <el-form ref="registerFormRef" size="large" autocomplete="off" v-if="isRegister" :model="registerData" :rules="rules">
                <el-form-item>
                    <h1>注册</h1>
                </el-form-item>
                <el-form-item prop="username">
                    <el-input :prefix-icon="User" placeholder="请输入用户名" v-model="registerData.username"></el-input>
                </el-form-item>
                <el-form-item prop="password">
                    <el-input :prefix-icon="Lock" type="password" placeholder="请输入密码"
                        v-model="registerData.password"></el-input>
                </el-form-item>
                <el-form-item prop="rePassword">
                    <el-input :prefix-icon="Lock" type="password" placeholder="请输入再次密码"
                        v-model="registerData.rePassword"></el-input>
                </el-form-item>
                <!-- 注册按钮 -->
                <el-form-item>
                    <el-button class="button" type="primary" auto-insert-space @click="handleRegister">
                        注册
                    </el-button>
                </el-form-item>
                <el-form-item class="flex">
                    <el-link type="info" :underline="false" @click="isRegister = false;clearRegisterData()">
                        ← 返回
                    </el-link>
                </el-form-item>
            </el-form>
            <!-- 登录表单 -->
            <el-form ref="loginFormRef" size="large" autocomplete="off" v-else :model="registerData" :rules="rules">
                <el-form-item>
                    <h1>管理端登录</h1>
                </el-form-item>
                <el-form-item prop="username">
                    <el-input :prefix-icon="User" placeholder="请输入用户名" v-model="registerData.username"></el-input>
                </el-form-item>
                <el-form-item prop="password">
                    <el-input name="password" :prefix-icon="Lock" type="password" placeholder="请输入密码" v-model="registerData.password"></el-input>
                </el-form-item>
                <el-form-item class="flex">
                    <div class="flex">
                        <el-checkbox>记住我</el-checkbox>
                        <el-link type="primary" :underline="false">忘记密码？</el-link>
                    </div>
                </el-form-item>
                <!-- 登录按钮 -->
                <el-form-item>
                    <el-button class="button" type="primary" auto-insert-space @click="handleLogin">登录</el-button>
                </el-form-item>
                <el-form-item class="flex">
                    <el-link type="info" :underline="false" @click="isRegister = true;clearRegisterData()">
                        注册 →
                    </el-link>
                </el-form-item>
            </el-form>
        </el-col>
    </el-row>
</template>

<script setup>
import { User, Lock } from '@element-plus/icons-vue'
import { ref } from 'vue'
import { ElMessage } from 'element-plus';
import { useRouter } from 'vue-router'
import { useTokenStore } from '@/stores/token.js';
import { userRegisterService, userLoginService } from '@/api/user.js'

// 控制注册与登录表单的显示， 默认显示登录
const isRegister = ref(false)
// 定义数据模型
const registerData = ref({
    username: '',
    password: '',
    rePassword: ''
})

// 表单引用
const registerFormRef = ref(null)
const loginFormRef = ref(null)

// 校验密码是否一致
const checkRePassword = (rule, value, callback) => {
    if (value !== registerData.value.password) {
        callback(new Error('两次密码不一致'))
    } else if (value === '') {
        callback(new Error('请再次输入密码'))
    } else {
        callback()
    }
}

// 定义表单创建规则
const rules = {
    username: [
        { required: true, message: '请输入用户名', trigger: 'blur' },
        { min: 5, max: 16, message: '长度在5到16个字符', trigger: 'blur' }
    ],
    password: [
        { required: true, message: '请输入密码', trigger: 'blur' },
        { min: 5, max: 16, message: '长度在5到16个字符', trigger: 'blur' }
    ],
    rePassword: [
        { validator: checkRePassword, trigger: 'blur' }
    ]
}

// 调用后台接口完成注册
const handleRegister = async () => {
    const form = registerFormRef.value
    form.validate(async (valid) => {
        if (valid) {
            try {
                let result = await userRegisterService(registerData.value)
                console.log(result);
                ElMessage.success(result.msg ? result.msg : '注册成功');
                if (result.code === 0) {
                    // 清空表单数据
                    clearRegisterData()
                    // 切换到登录表单
                    isRegister.value = false
                }
            } catch (error) {
                ElMessage.error('注册失败，请稍后重试');
            }
        }
    })
}

// 登陆函数
const tokenStore = useTokenStore();
// 获取路由对象
const router = useRouter();
const handleLogin = async () => {
    const form = loginFormRef.value
    form.validate(async (valid) => {
        if (valid) {
            try {
                let result = await userLoginService(registerData.value)
                ElMessage.success(result.msg ? result.msg : '登录成功');
                // 把得到的token存储到pinia中
                tokenStore.setToken(result.data);
                // 跳转到首页 借助于路由完成跳转
                router.push('/')
            } catch (error) {
                ElMessage.error('登录失败，请检查用户名和密码');
            }
        }
    })
}

const clearRegisterData = () => {
    registerData.value = {
        username: '',
        password: '',
        rePassword: ''
    }
}
</script>

<style lang="scss" scoped>
/* 样式 */
.login-page {
    height: 100vh;
    background-color: #fff;

    /* .bg {
        background: url('@/assets/logo2.png') no-repeat 60% center / 240px auto,
            url('@/assets/login_broundground.png') no-repeat center / cover;
        border-radius: 0 20px 20px 0;
    } */
     .bg {
        background: url('@/assets/logo2.png') no-repeat 60% center / 240px auto,
        url('@/assets/login_bg.png') no-repeat 60% center / cover;
    }

    .title {
        font-size: 40px;
        font-family:'Lucida Sans', 'Lucida Sans Regular', 'Lucida Grande', 'Lucida Sans Unicode', Geneva, Verdana, sans-serif;
        color: #def108;
        text-align: center;
        line-height: 100vh;
    }

    .form {
        display: flex;
        flex-direction: column;
        justify-content: center;
        user-select: none;

        .button {
            width: 100%;
        }

        .flex {
            width: 100%;
            display: flex;
            justify-content: space-between;
        }
    }
}
</style>